HOME >> BIOLOGY >> NEWS
Divers may soon wax lyrical about some new hot installation -- The water's fine

Frigid ocean depths may become a more hospitable place for scuba divers who have to spend hours underwater at temperatures just above freezing, thanks to the US Navy.

For some jobs, divers can wear "hot water suits" that rely on warm water being pumped around a suit via a hose from the surface, but the hose can get in the way. So the US Navy has long been experimenting with special materials to prevent heat loss. Now it looks as though they're finally getting somewhere.

The secret is a layer of foam containing bits of wax inside tiny plastic beads, each just a tenth the width of a human hair. These bits of wax melt and freeze as the temperature changes. While the diver is putting on the drysuit, the wax absorbs warmth from the diver's body and melts. But when the diver slips into the icy waters, the wax freezes, radiating latent heat back to the diver.

The waxes are long hydrocarbon chains that have been chosen because of the temperatures at which they change phase. To provide optimal warmth to the diver, the waxes must melt at a temperature below that of bare skin-about 33 C. Similarly, the waxes must freeze at temperatures as high as 18 C to provide enough heat to the diver.

So far, the warming effect lasts for about the first half an hour or so of the dive (Ocean Engineering, vol 26, p 547), but the US Navy wants to improve on that, says Lew Nuckols, of the US Naval Academy in Annapolis, the Navy scientist developing the suit. He is looking at various ways of extending the warming period, such as packing more of the waxes into the diving suit liner or weaving the beads into layers of synthetic fabric instead of foam.

The beads, which look like fine dust, can be placed inside fabric fibres by mixing them with the liquid polymers used to make artificial fibres. Fabrics such as polypropylene, which is water-resistant, are made by pumping a liquid polymer through a device like a spaghetti-maker. Anoth
'"/>

Contact: Claire Bowles
claire.bowles@rbi.co.uk
44-171-331-2751
New Scientist
24-Jun-1999


Page: 1 2

Related biology news :

1. Fostering Diversity in the Sciences Symposium
2. Diversity: What people, grain sorghum have in common
3. Diversity hot spots at cold seeps?
4. JGI and Diversa Corp. announce large-scale microbial sequencing collaboration
5. Diversity of species triumphs
6. Diversity of trees in forests may be caused by soil pathogens, IU biologists find
7. Undiscovered Biological Diversity: A Symposium On Bioprospecting
8. New Areas Of High Biological Diversity Discovered
9. Little-Explored African Genetic Diversity May Hold Key To Human Origins, Medical Questions
10. Researcher Finds Worlds Most Diverse Home Of Slime Molds
11. "Health Of Hanford" Conference Gathers Diverse Audience To Review And Discuss Health Issues

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Divers may soon wax lyrical about some new hot installation The water fine

(Date:12/19/2014)... 18, 2014   LaunchKey , the first decentralized mobile ... Internet of Things era, today announced the close of ... was led by Metamorphic Ventures with participation from ENIAC ... and others.  LaunchKey has raised $4 million to date, ...
(Date:12/17/2014)... Valencell, a leader in performance biometric data sensor ... leaders such as Intel, Jabra, Atlas, and Scosche to ... These products will be showcased at CES 2015, taking ... . "Our partners choose PerformTek biometrics, ...
(Date:12/11/2014)... and Markets , http://photos.prnewswire.com/prnh/20130307/600769 ... the addition of the "Biometrics Market in the ... One major trend emerging in this market is ... is important to upgrade biometric solutions to the latest ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
(Date:12/24/2014)... Dec. 24, 2014  United Therapeutics Corporation (NASDAQ: ... MDT ) has submitted a pre-market approval application ... the use of Medtronic,s SynchroMed ® II implantable ... use with United Therapeutics, Remodulin ® (treprostinil) Injection ...
(Date:12/24/2014)...  Vermillion, Inc. (Nasdaq:   VRML), a bio-analytical solutions ... the Company closed its previously announced private placement ... W. Schuler , Birchview Fund LLC and several ... offering expenses.  The proceeds will be used for ...
(Date:12/24/2014)... (PRWEB) December 23, 2014 “Preparative ... Gas, HPLC, Flash), Consumables (Columns, Solvents, Buffers, Valves, ... Food & Agriculture) - Forecasts to 2019” provides ... challenges, opportunities, current market trends, and strategies impacting ...
(Date:12/24/2014)... Earlier this year in a June 24 international conference presentation, ... Technology Center, LLC ( ASCTC ) focused attention on an ... stem cells. His title “Asymmetric Self-Renewal by Distributed Stem ... the essence of his message to congress participants. He ...
Breaking Biology Technology:United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 2Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 4Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 2Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 3Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 4
Cached News: